diff options
Diffstat (limited to 'lib/cpus/aarch64/cortex_a78_ae.S')
| -rw-r--r-- | lib/cpus/aarch64/cortex_a78_ae.S | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/cpus/aarch64/cortex_a78_ae.S b/lib/cpus/aarch64/cortex_a78_ae.S index c8cccf278..421c17433 100644 --- a/lib/cpus/aarch64/cortex_a78_ae.S +++ b/lib/cpus/aarch64/cortex_a78_ae.S @@ -18,6 +18,36 @@ #endif /* -------------------------------------------------- + * Errata Workaround for A78 AE Erratum 1941500. + * This applies to revisions r0p0 and r0p1 of A78 AE. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * -------------------------------------------------- + */ +func errata_a78_ae_1941500_wa + /* Compare x0 against revisions r0p0 - r0p1 */ + mov x17, x30 + bl check_errata_1941500 + cbz x0, 1f + + /* Set bit 8 in ECTLR_EL1 */ + mrs x0, CORTEX_A78_AE_CPUECTLR_EL1 + bic x0, x0, #CORTEX_A78_AE_CPUECTLR_EL1_BIT_8 + msr CORTEX_A78_AE_CPUECTLR_EL1, x0 + isb +1: + ret x17 +endfunc errata_a78_ae_1941500_wa + +func check_errata_1941500 + /* Applies to revisions r0p0 and r0p1. */ + mov x1, #CPU_REV(0, 0) + mov x2, #CPU_REV(0, 1) + b cpu_rev_var_range +endfunc check_errata_1941500 + +/* -------------------------------------------------- * Errata Workaround for A78 AE Erratum 1951502. * This applies to revisions r0p0 and r0p1 of A78 AE. * Inputs: @@ -78,6 +108,11 @@ func cortex_a78_ae_reset_func bl cpu_get_rev_var mov x18, x0 +#if ERRATA_A78_AE_1941500 + mov x0, x18 + bl errata_a78_ae_1941500_wa +#endif + #if ERRATA_A78_AE_1951502 mov x0, x18 bl errata_a78_ae_1951502_wa @@ -138,6 +173,7 @@ func cortex_a78_ae_errata_report * Report all errata. The revision-variant information is passed to * checking functions of each errata. */ + report_errata ERRATA_A78_AE_1941500, cortex_a78_ae, 1941500 report_errata ERRATA_A78_AE_1951502, cortex_a78_ae, 1951502 ldp x8, x30, [sp], #16 |